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When you're an Oscar winner and you're making millions of dollars for every movie, the idea of living on only $1.50 a day probably seems impossible. But that's not stopping Ben Affleck, who has signed up to take the Live Below the Line challenge next week.

That's right, for at least one full day, the big star will keep his food and drink costs below what many pay for just a 12-ounce can of soda. And it's all for a very good cause — he'll be raising awareness and funds relating to extreme poverty for The Global Poverty Project, which, according to its website, aims to "increase the number and effectiveness of people taking action to see an end to extreme poverty." $1.50 is considered the accepted global figure to define the problem.

Affleck is joined by Sophia Bush, Josh Groban, Debi Mazar, and Hunter Biden in this attempt to better understand the kind of hunger and difficulty faced by more than 1.4 billion people worldwide.

We're expecting to see the 40-year-old, as well as his counterparts, tweeting their experiences, as well as what they're eating and drinking, throughout next week on their personal accounts, as well as @LBLUS.

"Last year we had over 15,000 people participate, and raised over $3 million," Michael Trainer, U.S. Country Director of The Global Poverty Project, said in a statement. "We're excited to leverage the support The Global Poverty Project has received from the campaign last year, and the Global Citizen Festival in Central Park."